You're talking about in 3rd person, right? Because that is the only time I have noticed that ranged attacks (bows, spells, shouts) all fire out to the left of the crosshair.
They shoot perfectly on the crosshair (well, arrows have this strange "up-and-over" arc, so if a target is rather close, shooting for their head sometimes makes it go OVER them) when in 1st person.